JPH0644373Y2 - saw - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a saw for cutting raw wood such as trees.

[Conventional technology]

Conventionally used saws are mainly those in which saw teeth are simply engraved on the blade portion at the end of the saw blade. In the large saw for cutting large trees for forests and lumbers among them, in the saw teeth (2) forming a row, a deep recess is formed in the plate surface between the saw teeth (2) every several saw teeth (2). (2 ₂ ) is provided in one place, and sawdust of the tree generated by the sawteeth (2 ₁ ) when cutting the cutout is discharged from the cut end of the cutout to the outside through the recess (2 ₂ ). It is intended to eliminate the clogging caused by.

By the way, when an object to be cut, particularly a raw tree such as a tree, is cut by the above-mentioned conventional saw, the former saw composed of only saw teeth does not sufficiently discharge the sawdust generated at the time of cutting and the saw teeth and the saw teeth are not discharged. The saw teeth are clogged because they stay in the valleys between them and the valleys are filled, and the saw teeth are sharp but have a poor scraping ability that reduces the cutting ability of the saw. (2) is a set and a recess (2 ₂ ) is provided between the sets, the sawteeth ( ₂ ) sandwiching the recess (2 2)
The sawdust generated from the is stored in the recess (2 ₂ ), but with the other saw teeth (2) the sawdust is not as good as the saw and the valley (2 ₃ ) is clogged in a short time. To do. Moreover, since the width of the mouth of the recess (2 ₂ ) is the same as the width of the back as shown in FIG. 3, it is not possible to control the storage speed of the sawdust stored here, so the valley (2 ₃₎ )
Sawdust that has not been loosening rapidly concentrated to recess (2 ₂₎ in the longitudinal movement of the saw, concentrating the recess (2 ₂₎ in than the amount that is discharged to the outside of the saw in recess (2 ₂₎ in a The amount becomes large, and the depressions (2 ₂ ) also clogging other valleys (2 ₃ ) following the clogging of the sawdust, reducing the scrap handling of the sawdust, and the cutting of the saw to the cut object is extremely deteriorated. Since it is a thing, it cannot be said that the clogging phenomenon of saw sawdust has been fundamentally eliminated.

[Problems to be solved by the device]

Since raw trees such as trees contain a large amount of resin and water,
When cut with a saw, the generated sawdust is not handled well and is discharged to the outside.It is concentrated in the valley between the saw teeth and compressed in the valley while the small pieces of sawdust are solidified by the resin to form a mass of sawdust. Further, the frictional heat generated by the contact between the saw blade and the object to be cut causes the lump of sawdust to become a harder lump and adheres to the saw blade, which makes it difficult for the sawdust to separate from the trough, resulting in strong clogging and impeding the saw cutting operation.

Therefore, if the valley of the saw becomes clogged, the cutting operation will be stopped,
This is a troublesome work in which the saw is pulled out from the object to be cut, the sawdust clogging the valley is removed, and then the saw blade is inserted again from the cut end of the object to be cut. However, since this clogging occurs in a short cutting time, when cutting a raw tree or a large tree, it is necessary to remove the clogs, which is a frequent operation, and work that requires a lot of time for cutting. It is inefficient and has poor sex.

[Means for Solving the Problems]

This device was devised in view of the above-mentioned problems, and the saw blade (2) provided on the saw blade ( ₁ ) faces the plate surface in the vicinity of the bottom part (2 ₁ ) of the saw blade (2 ₁ ) so as to face the bottom part (2 ₁ ). was bored Chiriana (3), further, the eye bottom (2 ₁₎ and Haichiriana (3) Mesoko portion (2 ₁₎ narrow passage (4) of width leading to Haichiriana (3) from between the Is provided.

[Action]

When cutting the object to be cut with the saw of the present invention described above, when the saw teeth (2) cut into the object to be cut, small chips, that is, sawdust is generated. A part of this sawdust is scraped out of the object to be cut by the saw teeth (2) as the saw moves back and forth with respect to the object to be cut. It concentrates in the interval (2), that is, in the valley (2 ₃ ), and forms a mass of sawdust in a state of being slightly compressed on the bottom side (2 ₁ ) side. However, in the saw of the present invention, the width of the bottom (2 ₁ ) of the valley (2 ₃ ) facing the bottom (2 ₁ ) to the dust hole (3) provided on the plate surface of the saw blade (1) is narrow. Due to the passage (4), sawdust is gradually pushed out into the dust discharge hole (3) from the narrow passage (4) having a narrow width. Next, since the amount of inflow of the sawdust that has entered the dust removal hole (3) is small, it does not stop and stay in the dust removal hole (3) and is immediately discharged smoothly to the outside of the saw. passage (4) regulates the flow of sawdust from the valley ₍₂₃₎ to Haichiriana (3), Haichiriana (3) so as sawdust is not too reservoir to, and not to stay in the valley ₍₂₃₎ If the width of this passage (4) is too wide, the same result as the saw shown in Fig. 3 will be produced and the sawdust will be clogged. Conversely, if the width is too narrow, the flow of sawdust will decrease. Sawdust is pressed into the valley (2 ₃ ) and the purpose cannot be reached. Merits is that the sized to sawdust does not stay in both Haichiriana the width of the passage (4) (3) and valleys _(23), valleys caused to occur by the sawtooth (2) (2 ₃₎ The sawdust sent to is pushed out little by little from the passage (4) to the dust hole (3) before the too much solidification in the valley (2 ₃ ) and the sawdust in the dust hole (3) also gathers. It is possible to cut without clogging, which is discharged to the outside of the saw before it becomes full.

〔Example〕

With reference to the drawings illustrating an embodiment of the present invention,
Fig. 1 shows a pruning saw that cuts branches for shaping trees, and this saw is used for a large saw for felling trees in forests, a large saw for sawing used for lumber, and other woodworking work. It may be a saw blade used for a work saw or a saw machine, and the point is to be a saw for cutting raw wood or similar wood.
Needless to say, it may be used for cutting dried ones other than raw wood.

In the figure, (1) is the blade of a pruning saw with a blade spanning 180 mm to 240 mm for cutting tree branches, etc. (2)
Is a saw tooth for horizontal grinding called Edo mesh, and may be a saw tooth such as a thorn mesh or a rattle mesh, and the point is not limited to the embodiment as long as the saw blade can cut an object to be cut.

However, as a means for smoothing the passage of the saw to the object to be cut, in the embodiment, the plate thickness on the saw tooth side of the saw blade is made thicker than the plate thickness on the back side. Needless to say, a saw blade having the same plate thickness on the back side may be used in which a saw tooth is swung to form a "clam".

(3) the valley ₍₂₃₎ of the eye bottom (2 ₁₎ diameter eye bottom at every distance from (2 ₁₎ to a position separated about 2 millimeters is 2.
A 5 mm circular hole is formed as a dust removal hole. That is, the saw teeth (2) correspond to the second eye and one dust discharge hole (3).

The ratio of the number of the dust holes (3) to the saw teeth (2) is not limited to that in the embodiment, but the generated sawdust is discharged from the valley (2 ₃ ) through the passage (4) to the dust hole (3). It should be something that can be done smoothly.

Then, the above Haichiriana (3) and Mesoko portion (2 ₁₎ is one in which width are connected by one millimeter path (4), pore size and path of the Haichiriana (3) ( The width and length in 4) are not limited to the examples, and the numerical values in the examples are such that the blade width is 180.
This is an example of the one that showed the best cutting effect in a pruning saw of 240 mm to 240 mm, and in addition to this, it is good to set the numerical size according to the purpose of the work, that is, the bottom part (2 ₁ ) and the dust hole. Anything may be used as long as it is connected to (3) by a narrow passage (4) having a size suitable for the saw.

[Effect of device]

This invention is wood, especially the eye bottom of the valley sawdust valley staying in (2 ₃₎ (2 ₃₎ between during the cutting work with the cutting of rough wood saw-toothed (2) (2) (2 ₁ ) And the dust-exhaust hole (3), the sawdust that has been fed into the dust-exhaust hole (3) little by little through the narrowed constricted passage (4) and then has entered the dust-exhaust hole (3). ), It is immediately discharged to the outside of the saw without being retained, and the sawdust stays in the valley (2 ₃ ) and is compressed by the sawdust that comes in later and is solidified between the bottom of the eye (2 ₁ ). There is no inconvenience of forming a block of sawdust and causing a clogging phenomenon.

That is, the clogging phenomenon of the saw is eliminated. Therefore, since the saw is not clogged, the saw blade (2) is a good one with no change in sharpness that maximizes the original function of the saw with respect to the object to be cut, and it also cuts down well and the cutting work time can be significantly shortened. This can reduce the labor of the operator and reduce fatigue.

Further, when the object to be cut is cut by using the saw of the present invention, the cutting property is good, so that the object to be cut can be cut lightly and the cutting work can be performed while enjoying the comfort of cutting the saw.

[Brief description of drawings]

1 is a front view, FIG. 2 is an enlarged cross-sectional view taken along line II-II, and FIG. 3 is an enlarged view of a saw tooth, which is called an improved stitch in a conventional saw. 1: Saw blade, 2: Saw tooth, 2 ₁ : Bottom part of the eye, 2 ₂ : Depression, 2 ₃ : Valley, 3: Dust hole, 4: Passage.

Claims (1)

[Scope of utility model registration request] 1. A dust discharge hole (3) is formed on a plate surface near a bottom (2 ₁ ) of a saw tooth (2) engraved on the saw blade ( ₁ ) so as to face the bottom (2 ₁ ). together, characterized in that between the said first bottom (2 ₁₎ and Haichiriana (3), provided the eye bottom portion (2 ₁₎ narrow passage (4) of width leading to Haichiriana (3) from And saw.